4 ( 2x + 1 ) - 12 = 2 ( 2x + 6 )

4(2x+1) - 12 = 2(2x+6)
8x+4-12 = 4x+12
8x-4x+4-12-12 = 0
4x-20 = 0
4x = 20
x = 20/4
x = 5

jawab


4(2x +1) - 12 = 2(2x + 6)

8x + 4  - 12 = 4x  + 12
8x  - 8 = 4x + 12
8x - 4x = 12 + 8
4x = 20
x = 5